Help with AC Identification? What is it?

I have a 65 Dart with Factory AC and it doesn't look anything like that. Both the interior vents and the under the hood plumbing are totally different. Your picture doesn't show the heater controls. AC cars have a push button vacuum operated control. I believe non AC cars are horizontal sliders.

The evaporator in my car is part of the heater duct work. I'm betting your evaporator is in the under dash unit.

Maybe dealer installed?

I would upload some pictures, but I have mine all dissasembeled.